//
// "$Id: Fl_Text_Editor.cxx 10031 2013-12-13 16:28:38Z manolo $"
//
// Copyright 2001-2010 by Bill Spitzak and others.
// Original code Copyright Mark Edel.  Permission to distribute under
// the LGPL for the FLTK library granted by Mark Edel.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

#include <stdio.h>
#include <stdlib.h>
#include "flstring.h"
#include <ctype.h>
#include "Fl.H"
#include "Fl_Window.H"
#include "Fl_Text_Editor.H"
#include "fl_ask.H"


/* Keyboard Control Matrix

key\modifier   plain  Ctrl   Alt  Meta
  left          1/1  13/9   0/13  0/9
  right         2/2  14/10  0/14  0/10
  up            3/19 21/7   0/15  0/17
  down          4/20 22/8   0/16  0/18
  home          9/5  17/0   0/0   0/0
  end          10/6  18/0   0/0   0/0
  page up      11/7  23/0   0/11  0/0
  page down    12/8  24/0   0/12  0/0
    (FLTK action / OS X action)
    (adding the shift key extends the selection, all other combinations are no-op)

  0: no-op
  1: move cursor to the left, at line beginning wrap to end of prev line, at doc start no-op
  2: move cursor to the right, at line end move to beginning of the next line, at doc end no-op
  3: move cursor up, at doc top no-op
  4: move cursor down, at doc bottom no-op
  5: scroll display to top of text (cursor unchanged)
  6: scroll display to end of text (cursor unchanged)
  7: scroll text down one page (cursor unchanged)
  8: scroll text up one page (cursor unchanged)
  9: move cursor to beginning of line
 10: move cursor to end of line
 11: move cursor up one page and scroll down
 12: move cursor down one page and scroll up
 13: move to the beginning of the word or the previous word
 14: move to the end of the word or the next word
 15: if start of line: start of prev line, else start of this line
 16: if end of line: end of next line, else end of this line
 17: move cursor to the beginning of the document
 18: move cursor to the end of the document
 19: move cursor up, at doc top: home, at doc start: no-op)
 20: move cursor down, at doc bot: end, at doc end: no-op)
 21: scroll text down one line (cursor unchanged)
 22: scroll text up one line (cursor unchanged)
 23: move cursor to the beginning of the top of the screen
 24: move cursor to the beginning of the bottom of the window
*/

/**  The constructor creates a new text editor widget.*/
Fl_Text_Editor::Fl_Text_Editor(int X, int Y, int W, int H,  const char* l)
	: Fl_Text_Display(X, Y, W, H, l)
{
	mCursorOn = 1;
	insert_mode_ = 1;
	key_bindings = 0;
	set_flag(MAC_USE_ACCENTS_MENU);

	// handle the default key bindings
	add_default_key_bindings(&key_bindings);

	// handle everything else
	default_key_function(kf_default);
}

#ifndef FL_DOXYGEN
Fl_Text_Editor::Key_Binding* Fl_Text_Editor::global_key_bindings = 0;
#endif

// These are the default key bindings every widget should start with
static struct {
	int key;
	int state;
	Fl_Text_Editor::Key_Func func;
} default_key_bindings[] = {
	{ FL_Escape,    FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_ignore     },
	{ FL_Enter,     FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_enter      },
	{ FL_KP_Enter,  FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_enter      },
	{ FL_BackSpace, FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_backspace  },
	{ FL_Insert,    FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_insert     },
	{ FL_Delete,    FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_delete     },
	{ FL_Home,      0,                        Fl_Text_Editor::kf_move       },
	{ FL_End,       0,                        Fl_Text_Editor::kf_move       },
	{ FL_Left,      0,                        Fl_Text_Editor::kf_move       },
	{ FL_Up,        0,                        Fl_Text_Editor::kf_move       },
	{ FL_Right,     0,                        Fl_Text_Editor::kf_move       },
	{ FL_Down,      0,                        Fl_Text_Editor::kf_move       },
	{ FL_Page_Up,   0,                        Fl_Text_Editor::kf_move       },
	{ FL_Page_Down, 0,                        Fl_Text_Editor::kf_move       },
	{ FL_Home,      FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
	{ FL_End,       FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
	{ FL_Left,      FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
	{ FL_Up,        FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
	{ FL_Right,     FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
	{ FL_Down,      FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
	{ FL_Page_Up,   FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
	{ FL_Page_Down, FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
	{ FL_Home,      FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
	{ FL_End,       FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
	{ FL_Left,      FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
	{ FL_Up,        FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
	{ FL_Right,     FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
	{ FL_Down,      FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
	{ FL_Page_Up,   FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
	{ FL_Page_Down, FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
	{ FL_Home,      FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
	{ FL_End,       FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
	{ FL_Left,      FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
	{ FL_Up,        FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
	{ FL_Right,     FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
	{ FL_Down,      FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
	{ FL_Page_Up,   FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
	{ FL_Page_Down, FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
//{ FL_Clear,	  0,                        Fl_Text_Editor::delete_to_eol },
	{ 'z',          FL_CTRL,                  Fl_Text_Editor::kf_undo	  },
	{ '/',          FL_CTRL,                  Fl_Text_Editor::kf_undo	  },
	{ 'x',          FL_CTRL,                  Fl_Text_Editor::kf_cut        },
	{ FL_Delete,    FL_SHIFT,                 Fl_Text_Editor::kf_cut        },
	{ 'c',          FL_CTRL,                  Fl_Text_Editor::kf_copy       },
	{ FL_Insert,    FL_CTRL,                  Fl_Text_Editor::kf_copy       },
	{ 'v',          FL_CTRL,                  Fl_Text_Editor::kf_paste      },
	{ FL_Insert,    FL_SHIFT,                 Fl_Text_Editor::kf_paste      },
	{ 'a',          FL_CTRL,                  Fl_Text_Editor::kf_select_all },

#ifdef __APPLE__
	// Define CMD+key accelerators...
	{ 'z',          FL_COMMAND,               Fl_Text_Editor::kf_undo       },
	{ 'x',          FL_COMMAND,               Fl_Text_Editor::kf_cut        },
	{ 'c',          FL_COMMAND,               Fl_Text_Editor::kf_copy       },
	{ 'v',          FL_COMMAND,               Fl_Text_Editor::kf_paste      },
	{ 'a',          FL_COMMAND,               Fl_Text_Editor::kf_select_all },
	{ FL_Left,      FL_COMMAND,               Fl_Text_Editor::kf_meta_move  },
	{ FL_Right,     FL_COMMAND,               Fl_Text_Editor::kf_meta_move  },
	{ FL_Up,        FL_COMMAND,               Fl_Text_Editor::kf_meta_move  },
	{ FL_Down,      FL_COMMAND,               Fl_Text_Editor::kf_meta_move  },
	{ FL_Left,      FL_COMMAND|FL_SHIFT,      Fl_Text_Editor::kf_m_s_move   },
	{ FL_Right,     FL_COMMAND|FL_SHIFT,      Fl_Text_Editor::kf_m_s_move   },
	{ FL_Up,        FL_COMMAND|FL_SHIFT,      Fl_Text_Editor::kf_m_s_move   },
	{ FL_Down,      FL_COMMAND|FL_SHIFT,      Fl_Text_Editor::kf_m_s_move   },
#endif // __APPLE__

	{ 0,            0,                        0                             }
};

/**  Adds all of the default editor key bindings to the specified key binding list.*/
void Fl_Text_Editor::add_default_key_bindings(Key_Binding** list)
{
	for (int i = 0; default_key_bindings[i].key; i++) {
		add_key_binding(default_key_bindings[i].key,
		                default_key_bindings[i].state,
		                default_key_bindings[i].func,
		                list);
	}
}

/**  Returns the function associated with a key binding.*/
Fl_Text_Editor::Key_Func Fl_Text_Editor::bound_key_function(int key, int state, Key_Binding* list)
{
	Key_Binding* cur;
	for (cur = list; cur; cur = cur->next)
		if (cur->key == key)
			if (cur->state == FL_TEXT_EDITOR_ANY_STATE || cur->state == state)
				break;
	if (!cur) return 0;
	return cur->function;
}

/**  Removes all of the key bindings associated with the text editor or list.*/
void Fl_Text_Editor::remove_all_key_bindings(Key_Binding** list)
{
	Key_Binding *cur, *next;
	for (cur = *list; cur; cur = next) {
		next = cur->next;
		delete cur;
	}
	*list = 0;
}

/** Removes the key binding associated with the key \p key of state \p state
    from the Key_Binding list \p list.

    This can be used in derived classes to remove global key bindings
    by using the global (static) Key_Binding list
    Fl_Text_Editor::global_key_bindings.
*/
void Fl_Text_Editor::remove_key_binding(int key, int state, Key_Binding** list)
{
	Key_Binding *cur, *last = 0;
	for (cur = *list; cur; last = cur, cur = cur->next)
		if (cur->key == key && cur->state == state) break;
	if (!cur) return;
	if (last) last->next = cur->next;
	else *list = cur->next;
	delete cur;
}

/** Adds a \p key of state \p state with the function \p function to an
    arbitrary key binding list \p list.

    This can be used in derived classes to add global key bindings
    by using the global (static) Key_Binding list
    Fl_Text_Editor::global_key_bindings.
*/
void Fl_Text_Editor::add_key_binding(int key, int state, Key_Func function,
                                     Key_Binding** list)
{
	Key_Binding* kb = new Key_Binding;
	kb->key = key;
	kb->state = state;
	kb->function = function;
	kb->next = *list;
	*list = kb;
}

////////////////////////////////////////////////////////////////

static void kill_selection(Fl_Text_Editor* e)
{
	if (e->buffer()->selected()) {
		e->insert_position(e->buffer()->primary_selection()->start());
		e->buffer()->remove_selection();
	}
}

/** Inserts the text associated with the key */
int Fl_Text_Editor::kf_default(int c, Fl_Text_Editor* e)
{
	// FIXME: this function is a mess! Fix this!
	if (!c || (!isprint(c) && c != '\t')) return 0;
	char s[2] = "\0";
	s[0] = (char)c;
	kill_selection(e);
	if (e->insert_mode()) e->insert(s);
	else e->overstrike(s);
	e->show_insert_position();
	e->set_changed();
	if (e->when()&FL_WHEN_CHANGED) e->do_callback();
	return 1;
}

/** Ignores the keypress */
int Fl_Text_Editor::kf_ignore(int, Fl_Text_Editor*)
{
	return 0; // don't handle
}
/**  Does a backspace in the current buffer.*/
int Fl_Text_Editor::kf_backspace(int, Fl_Text_Editor* e)
{
	if (!e->buffer()->selected() && e->move_left()) {
		int p1 = e->insert_position();
		int p2 = e->buffer()->next_char(p1);
		e->buffer()->select(p1, p2);
	}
	kill_selection(e);
	e->show_insert_position();
	e->set_changed();
	if (e->when()&FL_WHEN_CHANGED) e->do_callback();
	return 1;
}

/** Inserts a newline at the current cursor position */
int Fl_Text_Editor::kf_enter(int, Fl_Text_Editor* e)
{
	kill_selection(e);
	e->insert("\n");
	e->show_insert_position();
	e->set_changed();
	if (e->when()&FL_WHEN_CHANGED) e->do_callback();
	return 1;
}

extern void fl_text_drag_me(int pos, Fl_Text_Display* d);
/**  Moves the text cursor in the direction indicated by key c.*/
int Fl_Text_Editor::kf_move(int c, Fl_Text_Editor* e)
{
	int i;
	int selected = e->buffer()->selected();
	if (!selected)
		e->dragPos = e->insert_position();
	e->buffer()->unselect();
	Fl::copy("", 0, 0);
	switch (c) {
	case FL_Home:
		e->insert_position(e->buffer()->line_start(e->insert_position()));
		break;
	case FL_End:
		e->insert_position(e->buffer()->line_end(e->insert_position()));
		break;
	case FL_Left:
		e->move_left();
		break;
	case FL_Right:
		e->move_right();
		break;
	case FL_Up:
		e->move_up();
		break;
	case FL_Down:
		e->move_down();
		break;
	case FL_Page_Up:
		for (i = 0; i < e->mNVisibleLines - 1; i++) e->move_up();
		break;
	case FL_Page_Down:
		for (i = 0; i < e->mNVisibleLines - 1; i++) e->move_down();
		break;
	}
	e->show_insert_position();
	return 1;
}

/**  Extends the current selection in the direction of key c.*/
int Fl_Text_Editor::kf_shift_move(int c, Fl_Text_Editor* e)
{
	kf_move(c, e);
	fl_text_drag_me(e->insert_position(), e);
	char *copy = e->buffer()->selection_text();
	if (copy) {
		Fl::copy(copy, (int) strlen(copy), 0);
		free(copy);
	}
	return 1;
}
/** Moves the current text cursor in the direction indicated by control key */
int Fl_Text_Editor::kf_ctrl_move(int c, Fl_Text_Editor* e)
{
	if (!e->buffer()->selected())
		e->dragPos = e->insert_position();
	if (c != FL_Up && c != FL_Down) {
		e->buffer()->unselect();
		Fl::copy("", 0, 0);
		e->show_insert_position();
	}
	switch (c) {
	case FL_Home:
		e->insert_position(0);
		e->scroll(0, 0);
		break;
	case FL_End:
		e->insert_position(e->buffer()->length());
		e->scroll(e->count_lines(0, e->buffer()->length(), 1), 0);
		break;
	case FL_Left:
		e->previous_word();
		break;
	case FL_Right:
		e->next_word();
		break;
	case FL_Up:
		e->scroll(e->mTopLineNum-1, e->mHorizOffset);
		break;
	case FL_Down:
		e->scroll(e->mTopLineNum+1, e->mHorizOffset);
		break;
	case FL_Page_Up:
		e->insert_position(e->mLineStarts[0]);
		break;
	case FL_Page_Down:
		e->insert_position(e->mLineStarts[e->mNVisibleLines-2]);
		break;
	}
	return 1;
}

/** Moves the current text cursor in the direction indicated by meta key */
int Fl_Text_Editor::kf_meta_move(int c, Fl_Text_Editor* e)
{
	if (!e->buffer()->selected())
		e->dragPos = e->insert_position();
	if (c != FL_Up && c != FL_Down) {
		e->buffer()->unselect();
		Fl::copy("", 0, 0);
		e->show_insert_position();
	}
	switch (c) {
	case FL_Up:				// top of buffer
		e->insert_position(0);
		e->scroll(0, 0);
		break;
	case FL_Down:			// end of buffer
		e->insert_position(e->buffer()->length());
		e->scroll(e->count_lines(0, e->buffer()->length(), 1), 0);
		break;
	case FL_Left:			// beginning of line
		kf_move(FL_Home, e);
		break;
	case FL_Right:			// end of line
		kf_move(FL_End, e);
		break;
	}
	return 1;
}

/** Extends the current selection in the direction indicated by meta key c. */
int Fl_Text_Editor::kf_m_s_move(int c, Fl_Text_Editor* e)
{
	kf_meta_move(c, e);
	fl_text_drag_me(e->insert_position(), e);
	return 1;
}

/** Extends the current selection in the direction indicated by control key c. */
int Fl_Text_Editor::kf_c_s_move(int c, Fl_Text_Editor* e)
{
	kf_ctrl_move(c, e);
	fl_text_drag_me(e->insert_position(), e);
	return 1;
}

/**  Moves the text cursor to the beginning of the current line.*/
int Fl_Text_Editor::kf_home(int, Fl_Text_Editor* e)
{
	return kf_move(FL_Home, e);
}

/**  Moves the text cursor to the end of the current line.*/
int Fl_Text_Editor::kf_end(int, Fl_Text_Editor* e)
{
	return kf_move(FL_End, e);
}

/**  Moves the text cursor one character to the left.*/
int Fl_Text_Editor::kf_left(int, Fl_Text_Editor* e)
{
	return kf_move(FL_Left, e);
}

/**  Moves the text cursor one line up.*/
int Fl_Text_Editor::kf_up(int, Fl_Text_Editor* e)
{
	return kf_move(FL_Up, e);
}

/**  Moves the text cursor one character to the right.*/
int Fl_Text_Editor::kf_right(int, Fl_Text_Editor* e)
{
	return kf_move(FL_Right, e);
}
/**  Moves the text cursor one line down.*/
int Fl_Text_Editor::kf_down(int, Fl_Text_Editor* e)
{
	return kf_move(FL_Down, e);
}

/**  Moves the text cursor up one page.*/
int Fl_Text_Editor::kf_page_up(int, Fl_Text_Editor* e)
{
	return kf_move(FL_Page_Up, e);
}

/**  Moves the text cursor down one page.*/
int Fl_Text_Editor::kf_page_down(int, Fl_Text_Editor* e)
{
	return kf_move(FL_Page_Down, e);
}
/**  Toggles the insert mode in the text editor.*/
int Fl_Text_Editor::kf_insert(int, Fl_Text_Editor* e)
{
	e->insert_mode(e->insert_mode() ? 0 : 1);
	return 1;
}

/**  Does a delete of selected text or the current character in the current buffer.*/
int Fl_Text_Editor::kf_delete(int, Fl_Text_Editor* e)
{
	if (!e->buffer()->selected()) {
		int p1 = e->insert_position();
		int p2 = e->buffer()->next_char(p1);
		e->buffer()->select(p1, p2);
	}

	kill_selection(e);
	e->show_insert_position();
	e->set_changed();
	if (e->when()&FL_WHEN_CHANGED) e->do_callback();
	return 1;
}

/**  Does a copy of selected text or the current character in the current buffer.*/
int Fl_Text_Editor::kf_copy(int, Fl_Text_Editor* e)
{
	if (!e->buffer()->selected()) return 1;
	const char *copy = e->buffer()->selection_text();
	if (*copy) Fl::copy(copy, (int) strlen(copy), 1);
	free((void*)copy);
	e->show_insert_position();
	return 1;
}

/**  Does a cut of selected text in the current buffer.*/
int Fl_Text_Editor::kf_cut(int c, Fl_Text_Editor* e)
{
	kf_copy(c, e);
	kill_selection(e);
	e->set_changed();
	if (e->when()&FL_WHEN_CHANGED) e->do_callback();
	return 1;
}

/**  Does a paste of selected text in the current buffer.*/
int Fl_Text_Editor::kf_paste(int, Fl_Text_Editor* e)
{
	kill_selection(e);
	Fl::paste(*e, 1);
	e->show_insert_position();
	e->set_changed();
	if (e->when()&FL_WHEN_CHANGED) e->do_callback();
	return 1;
}

/**  Selects all text in the current buffer.*/
int Fl_Text_Editor::kf_select_all(int, Fl_Text_Editor* e)
{
	e->buffer()->select(0, e->buffer()->length());
	const char *copy = e->buffer()->selection_text();
	if (*copy) Fl::copy(copy, (int) strlen(copy), 0);
	free((void*)copy);
	return 1;
}
/**  Undo last edit in the current buffer. Also deselect previous selection. */
int Fl_Text_Editor::kf_undo(int , Fl_Text_Editor* e)
{
	e->buffer()->unselect();
	Fl::copy("", 0, 0);
	int crsr;
	int ret = e->buffer()->undo(&crsr);
	e->insert_position(crsr);
	e->show_insert_position();
	e->set_changed();
	if (e->when()&FL_WHEN_CHANGED) e->do_callback();
	return ret;
}

/** Handles a key press in the editor */
int Fl_Text_Editor::handle_key()
{
	// Call FLTK's rules to try to turn this into a printing character.
	// This uses the right-hand ctrl key as a "compose prefix" and returns
	// the changes that should be made to the text, as a number of
	// bytes to delete and a string to insert:
	int del = 0;
	if (Fl::compose(del)) {
		if (del) {
			// del is a number of bytes
			int dp = insert_position() - del;
			if ( dp < 0 ) dp = 0;
			buffer()->select(dp, insert_position());
		}
		kill_selection(this);
		if (Fl::event_length()) {
			if (insert_mode()) insert(Fl::event_text());
			else overstrike(Fl::event_text());
		}
#ifdef __APPLE__
		if (Fl::compose_state) {
			int pos = this->insert_position();
			this->buffer()->select(pos - Fl::compose_state, pos);
		}
#endif
		show_insert_position();
		set_changed();
		if (when()&FL_WHEN_CHANGED) do_callback();
		return 1;
	}

	int key = Fl::event_key(), state = Fl::event_state(), c = Fl::event_text()[0];
	state &= FL_SHIFT|FL_CTRL|FL_ALT|FL_META; // only care about these states
	Key_Func f;
	f = bound_key_function(key, state, global_key_bindings);
	if (!f) f = bound_key_function(key, state, key_bindings);
	if (f) return f(key, this);
	if (default_key_function_ && !state) return default_key_function_(c, this);
	return 0;
}

/** does or does not a callback according to changed() and when() settings */
void Fl_Text_Editor::maybe_do_callback()
{
//  printf("Fl_Text_Editor::maybe_do_callback()\n");
//  printf("changed()=%d, when()=%x\n", changed(), when());
	if (changed() || (when()&FL_WHEN_NOT_CHANGED)) do_callback();
}

int Fl_Text_Editor::handle(int event)
{
	static int dndCursorPos;

	if (!buffer()) return 0;

	switch (event) {
	case FL_FOCUS:
		fl_set_spot(textfont(), textsize(), x(), y(), w(), h(), window());
		show_cursor(mCursorOn); // redraws the cursor
		if (buffer()->selected()) redraw(); // Redraw selections...
		Fl::focus(this);
		return 1;

	case FL_UNFOCUS:
		show_cursor(mCursorOn); // redraws the cursor
#ifdef __APPLE__
		if (buffer()->selected() && Fl::compose_state) {
			int pos = insert_position();
			buffer()->select(pos, pos);
			Fl::reset_marked_text();
		}
#endif
		if (buffer()->selected()) redraw(); // Redraw selections...
	case FL_HIDE:
		fl_reset_spot();
		if (when() & FL_WHEN_RELEASE) maybe_do_callback();
		return 1;

	case FL_KEYBOARD:
		if (active_r() && window() && this == Fl::belowmouse())
			window()->cursor(FL_CURSOR_NONE);
		return handle_key();

	case FL_PASTE:
		if (!Fl::event_text()) {
			fl_beep();
			return 1;
		}
		buffer()->remove_selection();
		if (insert_mode()) insert(Fl::event_text());
		else overstrike(Fl::event_text());
		show_insert_position();
		set_changed();
		if (when()&FL_WHEN_CHANGED) do_callback();
		return 1;

	case FL_ENTER:
// MRS: WIN32 only?  Need to test!
//    case FL_MOVE:
		show_cursor(mCursorOn);
		return 1;

	case FL_PUSH:
		if (Fl::event_button() == 2) {
			// don't let the text_display see this event
			if (Fl_Group::handle(event)) return 1;
			dragType = DRAG_NONE;
			if(buffer()->selected()) {
				buffer()->unselect();
			}
			int pos = xy_to_position(Fl::event_x(), Fl::event_y(), CURSOR_POS);
			insert_position(pos);
			Fl::paste(*this, 0);
			Fl::focus(this);
			set_changed();
			if (when()&FL_WHEN_CHANGED) do_callback();
			return 1;
		}
		break;

	case FL_SHORTCUT:
		if (!(shortcut() ? Fl::test_shortcut(shortcut()) : test_shortcut()))
			return 0;
		if (Fl::visible_focus() && handle(FL_FOCUS)) {
			Fl::focus(this);
			return 1;
		}
		break;

		// Handle drag'n'drop attempt by the user. This is a simplified
		// implementation which allows dnd operations onto the scroll bars.
	case FL_DND_ENTER: // save the current cursor position
		if (Fl::visible_focus() && handle(FL_FOCUS))
			Fl::focus(this);
		show_cursor(mCursorOn);
		dndCursorPos = insert_position();
		/* fall through */
	case FL_DND_DRAG: // show a temporary insertion cursor
		insert_position(xy_to_position(Fl::event_x(), Fl::event_y(), CURSOR_POS));
		return 1;
	case FL_DND_LEAVE: // restore original cursor
		insert_position(dndCursorPos);
		return 1;
	case FL_DND_RELEASE: // keep insertion cursor and wait for the FL_PASTE event
		if (!dragging) buffer()->unselect(); // FL_PASTE must not destroy current selection if drag comes from outside
		return 1;
	}

	return Fl_Text_Display::handle(event);
}

//
// End of "$Id: Fl_Text_Editor.cxx 10031 2013-12-13 16:28:38Z manolo $".
//
